Finding the Fourth Proportional to 2,610.86, 3,915.68 and 1,222.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.86 : 3,915.68 = 1,222.88 : x
2. Step 2: Convert to fraction form
   2,610.86/3,915.68 = 1,222.88/x
3. Step 3: Cross multiply
   2,610.86x = 3,915.68 × 1,222.88
4. Step 4: Simplify right side
   2,610.86x = 4,788,381.07
5. Step 5: Solve for x
   x = 4,788,381.07/2,610.86
6. Step 6: Final answer
   x = 1,834.03